<style>.my-table {
    border-collapse: collapse;
    width: 200px;
    height: 400px; /* Hücre yüksekliği */
}

.my-table td {
    border: 1px solid #000;
    width: 50px;
    text-align: center;
    vertical-align: middle;
    position: relative;
}

.vertical-text {
    writing-mode: vertical-rl; 
    transform: rotate(180deg); 
    font-weight: bold;
}
</style>
<table class="my-table">
    <tr>
        <td class="vertical-text">DEPO SORUMLUSU</td>
    </tr>
</table>